Disk harrow



R. W. KRAMER ETAL DISK HARROW March 12, 1963 3 Sheets-Sheet 1 Filed April 6, 1961 March 12, V1963 Filed April e, 1961 R. w. KRAMER Erm. 3,080,933

DISK HARRow 3 Sheets-Sheet 2 March 12, 1963 R. w. KRAMER ErAL DISK HARROW 3 Sheets-Sheet 3 Filed April 6, 1961 JIM/M7025 Eier-fafa d/FAME? .P5K/EN EHA/DEJES ON United States Patent Oilce y dd Patented Mar. l2, 1963 This invention relates to disk harrows and particularly to a tandem disk barrow wherein front and rear gang sections are mounted for relative angling on a supporting frame.

An object of the invention is the provision of a disk barrow of novel construction wherein means are provided for adjusting the gang sections to meet certain conditions.

A tandem disk barrow consists generally of a pair of tandem disk gang sections mounted on a frame, each section consisting of a pair of gangs which may be de-angled until their axes are in alignment for transport purposes, and in operation their relative angularity can be adjusted according to the requirements of the soil, etc., the gangs oi each section, however, being placed with their inner ends in close proximity. rl`he concave faces of the front gangs are directed outwardly and those of the rear gang inwardly for maximum tillage of the soil. However, under some orchard conditions where the harrow travels between rows, it is desirable to move soil away from the base of the vine or other plant while still cultivating the earth `between the rows.

Another object of this invention, therefore, is the provision of a disk barrow of novel construction wherein means arc provided for adjusting the lateral spacing between the gangs of the rear section while maintaining the front gangs in end-to-end relation and holding them in a selected adjusted position.

Another object of the invention is the provision of a disk barrow of novel construction wherein means are provided for adjusting the lateral spacing between the gangs and also for adjusting the angle therebetween.

Other objects and advantages of the invention will be,- comc clear from the following detailed description when read in' conjunction with the accompanying drawings, wherein:

FlGURE 1 is a plan view of a trail-behind tandem disk hai-row of the wheel-supported type, having parts removed for clarity, illustrating the disposition of o-pposed pairs of front and rear disk gangs on the fra-me.

FIGURE 2 is a plan view of a fragment of the disk barrow with the gangs disposed at a lesser angle than that shown in FIGURE 1, but with the gangs widely spaced apart;

FIGURE 3 is a vie-W similar to FIGURE 2 with the disk gangs oi the rear section disposed at the same angle as in FIGURE Z but with the gangs closer together;

FGURE 4 is a side elevation on an enlarged scale of a detail showing the rear end of the disk barrow of this invention, and

FlGURE 5 is a section taken on the line 5-5 of FIG- URE 1.

In the drawings the numeral designates the frame of the tandem disk barrow of this invention comprising laterally spaced longitudinally extending angle frame bars 11 rigidly connected by transversely extending forward and intermediate angle bars 12 and 13 and a rear transverse brace member 14.

At its front end the implement is provided with a hitch 15 adapted for connection to a tractive Vehicle and the entire frame is supported upon a pair of laterally spaced wheels mounted upon the ends of crank arms 17 aixed to the ends of a transversely extending shaft 18 mounted in bearings 19 carried by the frame.

The wheels 16 facilitate transportation of the disl harrow, the tool carryingrframe 10` of the implement be ing .elevated to a transport position by rocking the lshaf 1S in a direction to lower the wheels with respect tothf frame. This is accomplished by the provision of a hy draulic cylinder 20 pivotally anchored to a lug 21 se .cured to brace 12, and having a piston rod 22 slidabli therein and pivotally connected to an arm 23 affixed t( vthe shaft 13. Fluid under pressure is supplied to th. cylinder 2t) through hose lines 24 from a suitable sourci .of power on the vehicle by which the implement i;

propelled. l

The implement of this invention is a tandem disk har row Vcomprising front and rear disk gang sections 2S an( 26, respectively. The front section 25 comprises righ and lefthand, laterally spaced allochiral gangs 27 and 21 Amounted on the frame 10 in any suitable way, but prei erably Vby means, not shown, which include means fo` varying `the angle between the gangs 27 and 2S and fo adjusting the disk-carrying shafts 29 and 30 to a positioi in transverse alignment. It will be noted that the con cave faces of the disks 31 and 32 of the respective gang 27 and 28 face in opposite directions and in the operat ing position of FGURE l move the soil outwardly.

The disk gangs 33 and 34 of the rear implement sec tion 26 are substantial duplicates in reverse, and a de scription of one will suffice for both. Each of the gang 33 and 34 includes a rectangular frame 35 which carrie va shaft 36 upon which ismounted a plurality of disk 37, the concave tacesof which are directed diagonali; inwardly in the operating position shown in FIGURE to move lsoil inwardly.

The outer end of each gang frame 35 is connected b1 a pivot bolt 38 to a bracket 39 affixed to the outer end of an auxiliary frame member 40 which extends lateral ly outwardly from the lrear end of the implement fram 1? at opposite sides thereof. Auxiliary frame member riti serve as carriers for disk gangs 33 and 34 and each o the members 4Q is in the form of a rectangular box sec tion, the inner end of which is slidably receivable in socket member i1 aixed to the rear end of each fram bar 11.

The rear brace member 14 comprises longitudinall spaced angle bars 42 having downwardly extendin flanges 43 and serving as a guide to telescopically aru slidably receive the rear disk gang carrier or auxiliar frame mem-ber 40. Frame member 40 i-s disposed below the horizontal portions of angle bars 42 and a plate 4 engages the upper surface of the angle bars and is secure to the inner end of member 40 by bolts 45, passin through the space :between the bars 42, and received i one ot a plurality of openings 46 provided in auxiliar frame member 40 and extending lengthwise thereof.

At this point it should be clear that, by mounting th gangs 33 and 34 upon the auxiliary frame members 4t the gangs are laterally adjustable with respect to eac other by sliding the members 40 transversely in the socli ets 4l and guide formed by the members 42, to Vary th lateral spacing between the gangs. As shown in th drawings, the gangs 33 and 34 can be adjusted from th farthest lateral spacing sho-Wn in FIGURES 1 and 2 ir wardl-y to an intermediate position indicated in FIGUR 3. lf desired, of course, the rear gangs can be brougl together to the same spacing provided in the front gan-g The gangs are held in their laterally adjusted position b the provision of a bolt 4'7 mounted in the socket membe 41 and receivable in a selected one of the openings 4t Adjustment of the operating angle of the gangs 33 an 34 is made by horizontally swinging them. about the axe of the pivot bolts 38. Adjustment of the operating angl of the gangs or adjustment `thereof to an axially aligne position is accomplished by mechanism comprising crank 48 having a longitudinally extending portion rotatably receivable in a suitable opening in the rear flange 43, and a threaded section 49 receivable in a nut Sil affixed to the forward depending lange 43. The forward end of the crank 43 is rotatably received in a ysuitable opening provided in the upright portion 51 of a bracket 52 ailixed to a bar 53, the forward end of which is secured to the upper surface of a longitudinally shiftable member 54.

Longitudinally shiftable member 54 extends transversely between angle bars il of the implement frame lit and has aixed to each end a guide member 55 adapte to rest upon the upper edge of the upright flange portion 56 of frame bar 111 and provides support for the slidable memibcr 54.

Member 54 is generally square in cross-section, comrising a pair of longitudinally spaced channel members 57 spaced apart as clearly shown in FIGURE 5 to receive a bolt S, the upper end of which has mounted thereon a slide member 59, the ends of which are bent downwardly to partly embrace the upper edge of member 54. An arm 6@ of bracket 52 is secured to the lower surface of member 54. The upper end of bolt 58 is threaded and provided with a nut 61.

A tie bar 62 is atiixed to the upper surface of and connects bars 42 centrally thereof and this tie -bar is slidably engaged by the guide bar 53, the rear end of which is received between and held against lateral displacement by a pair of lugs 63 aiixed to and projecting upwardly from the rearmost angle bar 42 of brace 14.

The lower end of bolt 58 also passes through the horizontal flange portion of an angle bar 64 engaged by the head 65 of the bolt, at the inner end of the frame 35, bolt 58 forming a pivotal connection between the shiftable member 54 and the disk gang frame 35.

The pivotal connection of bolt 58 with the disk gang and the sliding connection thereof through bolt 58 with shiftable member 54 allows the gangs 33 and 34 to be angled and de-angled by longitudinal shifting of member 54 on the harrow frame. This longitudinal shifting of member 54 is accomplished by revolving the crank 48, the forward end of which is rotatably held with respect to bracket 52 by the provision of Washers 66, collars 67 and set screws 68 to hold the collars in place. Adjustment of the crank in nut 50 causes the entire crank, shiftable member 54 and guide bar 53 to be moved longitudinally as indicated in dotted lines in FIGURE 2 to vary the angle of the disk gang from a position such as that shown in FIGURE l to that of FGURE 2.

The sliding of member 59 carrying bolt 58 relative to shiftable member 54 compensates for adjustments made in the lateral spacing between the disk gangs by telescoping of theauxiliary frame members 40 relative to the main frame 10.

It is believed that the construction and operation of the novel tandem disk barrow of the present invention will be clearly understood from the foregoing description.

l It should likewise be understood that the invention has been described in its preferred embodiment and that modifications may `be made therein without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

l. in a disk barrow, a generally rectangular frame including laterally spaced longitudinally extending frame bars, a transverse guide member mounted on the frame, laterally spaced disk gang units mounted on the frame, cach said unit comprising a carrier telescopically receivable in one end of said guide member and slidable relative thereto from an extended position projecting laterally from the frame to a retracted tclescoped position in said guide member, a disk gang pivotally mounted on the carrier for angling in a horizontal plane relative thereto, means mounted on the frame and operatively connected to said gangs for adjusting the angle thereof and holding them in a selected adjusted position, said last mentioned means comprising a transversely extending longitudinally shiftable member mounted on the frame, transversely slidable pivot means slidably connecting said shiftable member to both said gangs for simultaneously angling the gangs upon shifting of the shiftable member, and a single adjusting means operatively connected between the frame and said shiftable member for shifting the latter.

2. The invention set forth in claim l, wherein said pivot means is slidable laterally relative to said longitudinally shiftable member and simultaneously with the shifting of the latter to compensate for the lateral adjustment of the disk gang carrier.

3. n a disk harrow, a generally rectangular frame including laterally spaced longitudinally extending frame bars, laterally spaced disk gang units mounted on the frame, each of said units comprising a carrier laterally movable relative to the frame and the other carrier, a disk gang pivota-lly mounted adjacent one end on the carrier for angling in a horizontal plane relative thereto, means cooperative between the frame and each of said carriers for holding the-m in a selected adjusted position, a transversely extending longitudinally shiftable member mounted on the frame, transversely slidable pivot means slidably connecting the other end of each of said gangs to said shiftable member to accommodate lateral shifting of said pivot means relative to said shiftable member simultaneously with the lateral movement of said carriers, and adjusting means mounted on the frame and operatively connected to said shiftable member for shifting the latter to angle the gangs.

References Cited in the file of this patent UNrTED STATES PATENTS 358,838 Chandler Mar. 8, 1887 799,012 Lindgren Sept. 5, 1905 2,897,905 McClesky Aug. 4, 1959 

1. IN A DISK HARROW, A GENERALLY RECTANGULAR FRAME INCLUDING LATERALLY SPACED LONGITUDINALLY EXTENDING FRAME BARS, A TRANSVERSE GUIDE MEMBER MOUNTED ON THE FRAME, LATERALLY SPACED DISK GANG UNITS MOUNTED ON THE FRAME, EACH SAID UNIT COMPRISING A CARRIER TELESCOPICALLY RECEIVABLE IN ONE END OF SAID GUIDE MEMBER AND SLIDABLE RELATIVE THERETO FROM AN EXTENDED POSITION PROJECTING LATERALLY FROM THE FRAME TO A RETRACTED TELESCOPED POSITION IN SAID GUIDE MEMBER, A DISK GANG PIVOTALLY MOUNTED ON THE CARRIER FOR ANGLING IN A HORIZONTAL PLANE RELATIVE THERETO, MEANS MOUNTED ON THE FRAME AND OPERATIVELY CONNECTED TO SAID GANGS FOR ADJUSTING THE ANGLE THEREOF AND HOLDING THEM IN A SELECTED ADJUSTED POSITION, SAID LAST MENTIONED MEANS COMPRISING A TRANSVERSELY EXTENDING LONGITUDINALLY SHIFTABLE MEMBER MOUNTED ON THE FRAME, TRANSVERSELY SLIDABLE PIVOT MEANS SLIDABLY CONNECTING SAID SHIFTABLE MEMBER TO BOTH SAID GANGS FOR SIMULTANEOUSLY ANGLING THE GANGS UPON SHIFTING OF THE SHIFTABLE MEMBER, AND A SINGLE ADJUSTING MEANS OPERATIVELY CONNECTED BETWEEN THE FRAME AND SAID SHIFTABLE MEMBER FOR SHIFTING THE LATTER. 